[system test] memcached exited with message "Error initializing sasl"

Install couchbase server 1.8.1 on 4 nodes cluster with default installation path and custom data path.
10.3.2.10
10.3.2.11
10.3.2.12
10.3.2.16
10.3.2.75

Create 3 buckets, one default, one sasl and one dedicated port bucket.
Load 20K items to each bucket.
Maintain load about 3K at each bucket.
Install couchbase server 2.0.0-1974 on node 10.3.2.76 with default installation path and custom data path.
Swap rebalance (add node 76 and remove node 75). Rebalance done.
Install couchbase server 2.0.0-1974 on node 10.3.2.77 with default installation path and custom data path.
Swap rebalance (add node 77 and remove node 16). Rebalance done.

Uninstall couchbase server 1.8.1 on node 16 and 75
Install couchbase server 2.0.0-1974 on node 16 and 75 with custom installation path (c:/one) and custom data path (c:/data)
Swap rebalance (add node 16 and 75 to cluster, remove node 11 and 12)
Rebalance failed in few minutes

I see a lot of error in log page with error

Port server memcached on node 'ns_1@10.3.2.16' exited with status 1. Restarting. Messages: Wed Dec 05 16:16:29.949804 Pacific Standard Time 3: Error initializing sasl.

[user:info,2012-12-05T14:59:51.730,ns_1@10.3.2.16:ns_node_disco<0.7785.0>:ns_node_disco:handle_info:162]Node 'ns_1@10.3.2.16' saw that node 'ns_1@10.3.2.12' came up.
[ns_server:debug,2012-12-05T14:59:51.730,ns_1@10.3.2.16:ns_node_disco_events<0.7784.0>:ns_node_disco_rep_events:handle_event:42]Detected a new nodes (['ns_1@10.3.2.12']). Moving config around.
[ns_server:info,2012-12-05T14:59:51.730,ns_1@10.3.2.16:ns_node_disco_events<0.7784.0>:ns_node_disco_log:handle_event:46]ns_node_disco_log: nodes changed: ['ns_1@10.3.2.10','ns_1@10.3.2.11',
'ns_1@10.3.2.12','ns_1@10.3.2.16',
'ns_1@10.3.2.76']
[ns_server:info,2012-12-05T14:59:51.730,ns_1@10.3.2.16:ns_config_rep<0.7791.0>:ns_config_rep:handle_info:220]Replicating config to/from:
['ns_1@10.3.2.12']
[ns_server:info,2012-12-05T14:59:51.730,ns_1@10.3.2.16:ns_config_rep<0.7791.0>:ns_config_rep:do_pull:341]Pulling config from: 'ns_1@10.3.2.12'

[user:info,2012-12-05T14:59:51.746,ns_1@10.3.2.16:ns_port_memcached<0.7891.0>:ns_port_server:handle_info:107]Port server memcached on node 'ns_1@10.3.2.16' exited with status 1. Restarting. Messages: Wed Dec 05 14:59:51.730078 Pacific Standard Time 3: Error initializing sasl.
[user:info,2012-12-05T14:59:51.746,ns_1@10.3.2.16:ns_node_disco<0.7785.0>:ns_node_disco:handle_info:162]Node 'ns_1@10.3.2.16' saw that node 'ns_1@10.3.2.77' came up.
[ns_server:debug,2012-12-05T14:59:51.746,ns_1@10.3.2.16:xdc_rdoc_replication_srv<0.7914.0>:xdc_rdoc_replication_srv:handle_info:132]doing replicate_newnodes_docs
[ns_server:info,2012-12-05T14:59:51.746,ns_1@10.3.2.16:ns_port_memcached<0.7891.0>:ns_port_server:log:171]memcached<0.7891.0>: Wed Dec 05 14:59:51.730078 Pacific Standard Time 3: Error initializing sasl.

[ns_server:info,2012-12-05T14:59:51.746,ns_1@10.3.2.16:set_view_update_daemon<0.7918.0>:set_view_update_daemon:init:50]Set view update daemon, starting with the following settings:
update interval: 5000ms
minimum number of changes: 5000

[error_logger:info,2012-12-05T14:59:51.746,ns_1@10.3.2.16:error_logger<0.6.0>:ale_error_logger_handler:log_report:72]
=========================PROGRESS REPORT=========================
supervisor:

{local,ns_server_sup}

started: [

{pid,<0.7914.0>}

,

{name,xdc_rdoc_replication_srv}

,
{mfargs,{xdc_rdoc_replication_srv,start_link,[]}},

{restart_type,permanent}

,

{shutdown,1000}

,

{child_type,worker}

]

[ns_server:debug,2012-12-05T14:59:51.746,ns_1@10.3.2.16:xdc_rdoc_replication_srv<0.7914.0>:xdc_rdoc_replication_srv:replicate_change_to_node:160]Sending _design/_replicator_info to ns_1@10.3.2.10
[ns_server:info,2012-12-05T14:59:51.746,ns_1@10.3.2.16:<0.7890.0>:supervisor_cushion:handle_info:62]Cushion managed supervisor for memcached failed:

{abnormal,1}

[ns_server:debug,2012-12-05T14:59:51.746,ns_1@10.3.2.16:xdc_rdoc_replication_srv<0.7914.0>:xdc_rdoc_replication_srv:replicate_change_to_node:160]Sending _design/_replicator_info to ns_1@10.3.2.11
[ns_server:debug,2012-12-05T14:59:51.746,ns_1@10.3.2.16:xdc_rdoc_replication_srv<0.7914.0>:xdc_rdoc_replication_srv:replicate_change_to_node:160]Sending _design/_replicator_info to ns_1@10.3.2.12
[user:warn,2012-12-05T14:59:51.746,ns_1@10.3.2.16:<0.7890.0>:supervisor_cushion:die_slowly:81]Service memcached exited on node 'ns_1@10.3.2.16' in 0.11s

[ns_server:debug,2012-12-05T14:59:51.746,ns_1@10.3.2.16:xdc_rdoc_replication_srv<0.7914.0>:xdc_rdoc_replication_srv:replicate_change_to_node:160]Sending _design/_replicator_info to ns_1@10.3.2.76
[ns_server:debug,2012-12-05T14:59:51.746,ns_1@10.3.2.16:ns_node_disco_events<0.7784.0>:ns_node_disco_rep_events:handle_event:42]Detected a new nodes (['ns_1@10.3.2.77']). Moving config around.
[ns_server:debug,2012-12-05T14:59:51.746,ns_1@10.3.2.16:xdc_rdoc_replication_srv<0.7914.0>:xdc_rdoc_replication_srv:replicate_change_to_node:160]Sending _design/_replicator_info to ns_1@10.3.2.77
[ns_server:debug,2012-12-05T14:59:51.746,ns_1@10.3.2.16:xdc_rdoc_replication_srv<0.7914.0>:xdc_rdoc_replication_srv:handle_info:132]doing replicate_newnodes_docs
[user:info,2012-12-05T14:59:51.746,ns_1@10.3.2.16:ns_cluster<0.776.0>:ns_cluster:perform_actual_join:676]Node ns_1@10.3.2.16 joined cluster
[ns_server:info,2012-12-05T14:59:51.746,ns_1@10.3.2.16:ns_node_disco_events<0.7784.0>:ns_node_disco_log:handle_event:46]ns_node_disco_log: nodes changed: ['ns_1@10.3.2.10','ns_1@10.3.2.11',
'ns_1@10.3.2.12','ns_1@10.3.2.16',
'ns_1@10.3.2.76','ns_1@10.3.2.77']
[cluster:debug,2012-12-05T14:59:51.746,ns_1@10.3.2.16:ns_cluster<0.776.0>:ns_cluster:handle_call:133]complete_join([

{<<"targetNode">>,<<"ns_1@10.3.2.16">>}

,
{<<"availableStorage">>,
{struct,[{<<"hdd">>,
[{struct,[

{<<"path">>,<<"C:\\">>}

,

{<<"sizeKBytes">>,104752124}

,

{<<"usagePercent">>,21}

]}]}]}},

{<<"memoryQuota">>,6553}

,
{<<"storageTotals">>,
{struct,[{<<"ram">>,
{struct,[

{<<"usedByData">>,1324889160}

,

{<<"total">>,8589467648.0}

,

{<<"quotaTotal">>,6871318528.0}

,

{<<"used">>,3064373248.0}

]}},
{<<"hdd">>,
{struct,[

{<<"usedByData">>,1331384984}

,

{<<"total">>,107266174976.0}

,

{<<"quotaTotal">>,107266174976.0}

,

{<<"used">>,22525896744.0}

,

{<<"free">>,84740278232.0}

]}}]}},
{<<"storage">>,
{struct,[

{<<"ssd">>,[]}

,
{<<"hdd">>,
[{struct,[

{<<"path">>,<<"c:/data">>}

,

{<<"quotaMb">>,<<"none">>}

,

{<<"state">>,<<"ok">>}

]}]}]}},
{<<"systemStats">>,
{struct,[

{<<"cpu_utilization_rate">>,45.3}

,

{<<"swap_total">>,17176993792.0}

,

{<<"swap_used">>,3208110080.0}

]}},
{<<"interestingStats">>,
{struct,[

{<<"curr_items">>,661759}

,

{<<"curr_items_tot">>,1325717}

,

{<<"vb_replica_curr_items">>,663958}

]}},

{<<"uptime">>,<<"52855">>}

,

{<<"memoryTotal">>,8589467648.0}

,

{<<"memoryFree">>,5.5250944e9}

,

{<<"mcdMemoryReserved">>,6553}

,

{<<"mcdMemoryAllocated">>,6553}

,

{<<"otpNode">>,<<"ns_1@10.3.2.10">>}

,

{<<"otpCookie">>,<<"nwuviqsbxzcqnmhv">>}

,

{<<"clusterMembership">>,<<"active">>}

,

{<<"status">>,<<"healthy">>}

,

{<<"hostname">>,<<"10.3.2.10:8091">>}

,

{<<"clusterCompatibility">>,1}

,

{<<"version">>,<<"1.8.1-937-rel-enterprise">>}

,

{<<"os">>,<<"windows">>}

,
{<<"ports">>,
{struct,[

{<<"proxy">>,11211}

,

{<<"direct">>,11210}

]}}]) ->

{ok, ok}